Fill Material at Integral End Bents

KYTC has adopted a modified procedure for designing and constructing approach fills at bridges with integral end bents at selected sites. The modified approach includes geosynthetic reinforced soil (GRS) backfill. Polystyrene foam (Geofoam) is placed between the GRS backfill and the bridge end. Based on displacement measurements obtained at two sites, this procedure has reduced settlement at bridge approaches. Based on comments from district construction staff there appears to be a need to modify the design where the geofoam and overlying pavement meet. There is also concern about the geofoam’s expense. Alternative materials dimensions and location, which would not be damaged by the bridge movement, should be explored to make the modified approach easier and cheaper to construct and reduce settlement further.


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    • Status: Completed
    • Funding: $220000
    • Contract Numbers:

      SPR 19-572

    • Sponsor Organizations:

      Kentucky Transportation Cabinet

      200 Mero Street
      Frankfort, KY  United States  40622
    • Performing Organizations:

      University of Kentucky, Lexington

      Kentucky Transportation Center College of Engineering, 176 Raymond Building
      Lexington, KY  United States  40506-0281
    • Principal Investigators:

      Sun, Charlie

    • Start Date: 20180701
    • Expected Completion Date: 20200630
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01677439
    • Record Type: Research project
    • Source Agency: University of Kentucky, Lexington
    • Contract Numbers: SPR 19-572
    • Files: RIP, STATEDOT
    • Created Date: Aug 6 2018 2:53PM